HP ProBook 4525s HP ProBook 4525s Notebook PC - Maintenance and Service Guide - Page 69

Heat sink and fan

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5. Remove the WWAN module (3) by pulling the module away from the slot at an angle. NOTE: WWAN modules are designed with a notch (4) to prevent incorrect insertion. Reverse this procedure to install the WWAN module. Heat sink and fan NOTE: The heat sink spare part kit includes replacement thermal material. Description Heat sink for use in computers with UMA graphics subsystems Heat sink for use in computers with discrete graphics subsystems Spare part number 598676-001 613291-001 Before removing the heat sink, follow these steps: 1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system. 2. Disconnect all external devices connected to the computer. 3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then unplugging the AC adapter from the computer. Component replacement procedures 61

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5.
Remove the WWAN module
(3)
by pulling the module away from the slot at an angle.
NOTE:
WWAN modules are designed with a notch
(4)
to prevent incorrect insertion.
Reverse this procedure to install the WWAN module.
Heat sink and fan
NOTE:
The heat sink spare part kit includes replacement thermal material.
Description
Spare part number
Heat sink for use in computers with UMA graphics subsystems
598676-001
Heat sink for use in computers with discrete graphics subsystems
613291-001
Before removing the heat sink, follow these steps:
1.
Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2.
Disconnect all external devices connected to the computer.
3.
Disconnect the power from the computer by first unplugging the power cord from the AC outlet
and then unplugging the AC adapter from the computer.
Component replacement procedures
61